21033302430 has 96 divisors (see below), whose sum is σ = 61274755584. Its totient is φ = 4598577984.

The previous prime is 21033302417. The next prime is 21033302447. The reversal of 21033302430 is 3420333012.

It is a super-2 number, since 2×21033302430² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21033302397 and 21033302406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277242 + ... + 344861.

It is an arithmetic number, because the mean of its divisors is an integer number (638278704).

Almost surely, 2^21033302430 is an apocalyptic number.

21033302430 is an abundant number, since it is smaller than the sum of its proper divisors (40241453154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21033302430 is a wasteful number, since it uses less digits than its factorization.

21033302430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622150 (or 622143 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21033302430 its reverse (3420333012), we get a palindrome (24453635442).

The spelling of 21033302430 in words is "twenty-one billion, thirty-three million, three hundred two thousand, four hundred thirty".